Linking the speed of the site to the conversion rate, I am gradually coming to the conclusion that even a slight acceleration can affect user behavior, although it is difficult to predict the exact effect in advance?

Even a slight acceleration of pages noticeably changes user behavior: fewer bounces, more clicks. On amasty.com I have read several cases where they show the effect of speed on conversion in real stores. By applying their recommendations, we were able to increase speed without making drastic code changes. This has really improved the user experience. Website AJAX scroll extension for Magento I recommend it to anyone who wants to understand how technical optimization directly affects business performance.